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AW: [Xen-users] cpu frequency scaling in xen 3.3.1

from [Carsten Schiers]

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To:	flo <flo@xxxxxxxxx>, xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject:	AW: [Xen-users] cpu frequency scaling in xen 3.3.1
From:	"Carsten Schiers" <carsten@xxxxxxxxxx>
Date:	Fri, 1 May 2009 23:08:08 +0200
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Florian,

you can only use cpufreq=dom0-kernel with this CPU. You need a cpufreq 
aware Dom0 Kernel and
the powernow driver also. You might use ondemand as governor.

BR,
Carsten.

-----Ursprüngliche Nachricht-----
Von: Florian Gleixner [mailto:flo@xxxxxxxxx] 
Gesendet: Samstag, 28. März 2009 14:39
An: xen-users@xxxxxxxxxxxxxxxxxxx
Betreff: [Xen-users] cpu frequency scaling in xen 3.3.1

Hi,

i read the xenpm wiki page, but i cannot use the "p-states". xenpm 
shows:

xenpm
cpu id               : 0
total C-states       : 2
idle time(ms)        : 1776034
C0                   : transition [00000000000000000000]
                       residency  [00000000000000000000 ms]
C1                   : transition [00000000000000260278]
                       residency  [00000000000000000000 ms]

cpu id               : 1
total C-states       : 0
idle time(ms)        : 1771123

[CPU0] failed to get P-states statistics information [CPU1] failed to 
get P-states statistics information

/proc/cpuinfo shows:
model name      : AMD Athlon(tm) Dual Core Processor 5050e

without xen i can scale the frequency perfectly. Are p-states for this 
CPU model unsupported? My grub line is:
    kernel /xen.gz cpufreq=xen cpuidle
...

Thanks for the help!

Florian



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